Name | 1,8-Naphthalic anhydride |
Synonyms | ai3-09071 naphthalic Naphthalic anh 1,8-Naphthalic anhydride 1,8 Naphthaloic Anhydride Two1,8-naphthaleneanhydride Benzo[de]isochromene-1,3-dione naphthalenedicarboxylicanhydride Naphthalenedicarboxylic-1,8-anhydride |
CAS | 81-84-5 |
EINECS | 201-380-2 |
InChI | InChI=1/C24H14O7/c25-21(26)15-9-1-5-13-7-3-11-17(19(13)15)23(29)31-24(30)18-12-4-8-14-6-2-10-16(20(14)18)22(27)28/h1-12H,(H,25,26)(H,27,28) |
Molecular Formula | C12H6O3 |
Molar Mass | 198.17 |
Density | 1.2571 (rough estimate) |
Melting Point | 269 °C |
Boling Point | 295.48°C (rough estimate) |
Flash Point | 272 °C |
Water Solubility | decomposes |
Solubility | Chloroform (Slightly, Heated), DMSO |
Vapor Presure | 0Pa at 25℃ |
Appearance | Powder |
Color | Beige to light brown |
BRN | 153190 |
Storage Condition | Store below +30°C. |
Sensitive | Moisture Sensitive |
Refractive Index | 1.5550 (estimate) |
Physical and Chemical Properties | Characteristics of precipitation of needle-like crystals in ethanol, diamond-like crystals in acetic acid. melting point 267~269 ℃ solubility: insoluble in water, ether, benzene, slightly soluble in hot ethanol, soluble in hot acetic acid. |
Use | Is an important raw material for the synthesis of perylene dyes, pigments and fluorescent whitening agents |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S24/25 - Avoid contact with skin and eyes. |
WGK Germany | 2 |
RTECS | QK5350000 |
FLUKA BRAND F CODES | 21 |
TSCA | Yes |
HS Code | 29173980 |
needle-like crystals were precipitated in ethanol, and diamond-like crystals were precipitated in acetic acid. Do not dissolve in water, ether, benzene, hot ethanol-soluble, soluble in hot acetic acid. Melting point 267~269 ℃, sublimation, no boiling point.
The industrial process is vaporized with primary air, mixed with secondary air, and oxidized to 1,8 naphthalene dicarboxylic anhydride with cobalt as a catalyst, and then cooled.
intermediates for dyes, pesticides, pharmaceuticals and polyester resins.